F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 3/16 (2006.01) F16K 3/02 (2006.01)
Patent
CA 2266407
A gate valve arrangement is provided herein. The gate valve includes a valve housing having a high pressure side and a low pressure side, and having first and second housing walls secured together in face to face relationship with an aperture extending through each housing wall in alignment about a central axis so as to define a chamber, including a gap, therebetween. The first housing wall is on the high pressure side of the valve housing, and the second housing wall is on the low pressure side. The gate valve further includes a sealing ring formed of an elastomeric material and having a valve seat extendable into the gap a predetermined distance, the sealing ring extending axially and lining the aperture of the first housing wall. The gate valve further includes a reciprocal gate plate having opposite sides, disposed within said chamber and formed with an imperforate section and an apertured section in sliding contact with the valve seat and reciprocable between an open position, wherein the apertured section is located between the apertures of the housing walls to provide a port for fluid flow, and a closed position, wherein the imperforate section is located between the apertures of the housing walls, to prevent fluid flow through the port, the port having a high pressure portion and a low pressure portion corresponding with the respective sides of the valve housing. The gate valve further includes a guide ring of load bearing material on each side of the reciprocal gate plate for absorbing a compressive load resulting from pressure difference between opposite sides of the reciprocal gate plate, the guide rings extending axially and lining the respective apertures of they housing walls. The guide rings have an inner periphery which is larger than the inner periphery of the sealing ring, and compressively engages the reciprocal gate plate. The gate valve further includes means for effecting sealing by the sealing ring, wherein pressure in the high pressure portion of the port acts to force the valve seat against the imperforate section of the gate plate. The gate valve further includes a first annular cavity defined between an inner portion of the sealing ring which is positioned radially outwardly of the valve seat, and the imperforate section of said reciprocal gate plate. The gate valve further includes a second cavity extending below the guide rings. The gate valve further includes means for venting fluid pressure existing in the first cavity to the low pressure portion of the port, including grooves formed in the guide rings for establishing fluid communication between the first cavity and the second cavity.
Ensemble clapet d'obturation constitué par au moins une bague d'étanchéité (40) définissant un siège de clapet (40a) et possédant une plaque (47) de type guillotine pouvant effectuer un déplacement alternatif afin de venir en contact avec le siège de clapet, de manière à exercer une pression créant une étanchéité dans un sens sur le siège et, simultanément, à permettre au siège de se libérer dans le sens opposé afin de dégager la pression à l'intérieur du clapet d'obturation.
Blenkush Robert
Reugemer Richard
Thomas David
Borden Ladner Gervais Llp
Dezurik Inc.
General Signal Corporation
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